To simplify software development
We define Open Source
The Open Source Definition is the foundation of the modern software ecosystem. We build a world where the freedoms and opportunities of Open Source software can be enjoyed by all.
The leading voice on the policies and principles of open source
Protecting the Open Source ecosystem
We support institutions and individuals working together to create communities of practice in which the healthy open source ecosystem thrives.
UN Open Source Week, AI Fellowship, and 2025 Annual Report
Members Newsletter – July 2026: Two weeks ago, I was joined by several staff and board members at UN Open Source Week. It’s remarkable to think about how this event has evolved to become one of …
Open Source AI Fellowship Announced at UN Open Source Week
The OSI is pleased to announce the launch of the Open Source AI Fellowship at UN Open Source Week.
Engaging on Age Attestation Policy in Brazil
OSI recently submitted comments to Brazil’s National Data Protection Authority (ANPD) regarding its draft guidance on technology providers under the ECA Digital framework, a law to protect children and teenagers in digital environments.
The OSI 2025 Annual Report Is Now Available
The Open Source Initiative's 2025 Annual Report documents a year in which Open Source found itself at the center of major debates around AI, cybersecurity, sustainability, and public policy.
Support Open Source
As a public charity organization, OSI is supported by donations of corporations and individuals. Thanks to our sponsors that support our vision to be the leading voice on policies and principles of Open Source.
The board of directors
Most of OSI’s board of directors are elected by individual members and Affiliate organizations.